Photooxidation of Benzyl Alcohols Sensitized by TiO2 in CH3CN in the Presence of Ag2SO4. Kinetic Evidence for the Involvement of Adsorption Phenomena

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Laura Amori, Tiziana Del Giacco, Cesare Rol and Giovanni V. Sebastiani


Abstract

X-Ring substituted benzyl alcohols are photooxidized to the corresponding aldehydes by TiO2 in CH3CN in the presence of Ag2SO4 and kinetic evidence suggests a changeover of the electron abstraction site from the aromatic moiety (X=4-CH3O, 4-CH3, 4-Cl, H, 3-Cl) to the hydroxylic group (X=3-CF3, 4-CF3), probably owing to the preferential adsorption of OH on TiO2.


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